What C # function name allows you to implicitly treat List <ChildClass> as a list <ParentClass>

Question

This is relevant for the technical discussion in which I participate.

Answer 1

You say general covariance - but that does not apply to List<T> , which is invariant.

This only applies to IEnumerable<T> :

 IEnumerable<ChildClass> children = new List<ChildClass>(); IEnumerable<ParentClass> parents = children; 

Answer 2

I think you mean covariance and contravariance.